The number of the tigers is getting . If we don’t help them, they will disappear a few yea

The number of the tigers is getting . If we don’t help them, they will disappear a few years
A. fewer and fewer, in
B. larger and larger, after
C. more and more, after
D. smaller and smaller, in

A. fewer and fewer, inB. larger and larger, afterC. more and more, after(答案→)D. smaller and smaller, in解析：句意：老虎的数量变得越来越少，如果我们不帮助它们，几年后，它们将会灭绝。The number of…的数量，作为主语谓语动词用单数的形式，形容数量只能用small/large来修饰，in+一段时间用于将来时态中，after+一段时间用于一般过去时，故选D

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